iMovie doesn't show my imported clips anymore

It worked fine in May, but now I can't work because it says "no clips" although my computer says "Import successfully". I have the latest update and the camera I'm working with is the Canon Legria X mini.

I'm importing them from the SD card. Like I said it worked in May, I already made a movie.

What's wrong now. I just can't figure it out.

I am working on a MacBook Pro 2012